Rapid spread agents may impair biological control in a tritrophic food web with intraguild predation

IF 3.1 3区环境科学与生态学 Q2 ECOLOGY

Ecological Complexity Pub Date : 2021-03-01 DOI:10.1016/j.ecocom.2021.100926

Lucas dos Anjos, Michel Iskin da S. Costa, Regina C. Almeida

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引用次数: 3

Abstract

The augmentation of natural enemies against agricultural pests is a common tactic undertaken to minimize crop damage without the use of chemical pesticides. Failures of this strategy may result from (i) Allee effects acting on biological control agent; (ii) trophic interactions between the released control agent and native species in the local ecosystem; (iii) excessively rapid spreading agents. To investigate the interplay of these mechanisms in pest biocontrol efficiency in the context of intraguild predation (IGP), we develop a one-dimensional dynamical model of a spatial, tritrophic food web with intraguild predation. We show that the agent’s diffusivity (i.e., agent’s dispersal speed), and intraguild predator’s addition of alternative food sources are important factors in determining the success or failure of pest biocontrol. These results are obtained for spatially explicit models by considering the speed of dispersal of the control agent and the pest. Feedback from theoretical models as the one constructed in this work can provide useful guidelines for practitioners in biological control.

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快速传播的病原体可能会破坏在一个有内部捕食的营养性食物网中的生物控制

增加对农业害虫的天敌是在不使用化学农药的情况下尽量减少作物损失的一种常用策略。这一战略的失败可能是由于(i)对生物防治剂产生的Allee效应;(ii)释放的防治剂与本地生态系统中本地物种之间的营养相互作用;(三)扩散过快的药剂。为了研究这些机制在种群内捕食(IGP)背景下对害虫生物防治效率的相互作用，我们建立了一个具有种群内捕食的空间营养食物网的一维动态模型。研究表明，药剂的扩散率(即药剂的扩散速度)和野生捕食者对替代食物来源的添加是决定害虫生物防治成败的重要因素。这些结果是通过考虑控制剂和害虫的扩散速度而得到的空间显式模型。本研究构建的理论模型的反馈可以为生物防治的从业者提供有用的指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ecological Complexity 环境科学-生态学

CiteScore

7.10

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Ecological Complexity is an international journal devoted to the publication of high quality, peer-reviewed articles on all aspects of biocomplexity in the environment, theoretical ecology, and special issues on topics of current interest. The scope of the journal is wide and interdisciplinary with an integrated and quantitative approach. The journal particularly encourages submission of papers that integrate natural and social processes at appropriately broad spatio-temporal scales. Ecological Complexity will publish research into the following areas: • All aspects of biocomplexity in the environment and theoretical ecology • Ecosystems and biospheres as complex adaptive systems • Self-organization of spatially extended ecosystems • Emergent properties and structures of complex ecosystems • Ecological pattern formation in space and time • The role of biophysical constraints and evolutionary attractors on species assemblages • Ecological scaling (scale invariance, scale covariance and across scale dynamics), allometry, and hierarchy theory • Ecological topology and networks • Studies towards an ecology of complex systems • Complex systems approaches for the study of dynamic human-environment interactions • Using knowledge of nonlinear phenomena to better guide policy development for adaptation strategies and mitigation to environmental change • New tools and methods for studying ecological complexity